What is this sensor for??
Thread Starter
Safety Car
Joined: Jun 2004
Posts: 4,023
Likes: 1,181
From: La Mesa CA
What is this sensor for??
71 350 Auto
This sensor is on the passenger side of the engine. The wires that plug in it are currently disconnected. What is it for?
This sensor is on the passenger side of the engine. The wires that plug in it are currently disconnected. What is it for?
Last edited by gleninsandiego; Feb 10, 2007 at 12:14 PM.
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
It is for the primative emissions that were on the car. It was a temp sensor to tell the system it was up to temp. It is not needed unless you are going back to dead stock with the car. It was hooked into the vacuum advance of the car and would not let the car go into advance until it was completly warmed up. Most if not all were not working within the first year of use.
Race Director
Joined: Aug 2004
Posts: 10,628
Likes: 132
From: Duvall, WA
Yep. I just plugged it when I put in my new heads. Water temp should be in the driver's side head unless someone changed it.
It is for the primative emissions that were on the car. It was a temp sensor to tell the system it was up to temp. It is not needed unless you are going back to dead stock with the car. It was hooked into the vacuum advance of the car and would not let the car go into advance until it was completly warmed up. Most if not all were not working within the first year of use.
Race Director
Joined: Jul 2004
Posts: 12,705
Likes: 329
From: Scottsdale Arizona
It is for the primative emissions that were on the car. It was a temp sensor to tell the system it was up to temp. It is not needed unless you are going back to dead stock with the car. It was hooked into the vacuum advance of the car and would not let the car go into advance until it was completly warmed up. Most if not all were not working within the first year of use.
In 81's and 82's, this is an important part of the CCC. Your car won't run right with the computer without it. On your 71, it's a great way to plug the hole in your head. Unless you're trying to bring your emissions equipment back to stock, just ignore it.
The similar sensor on the drivers side, if your car is so equiped, is for the temperature sender.
Le Mans Master
Joined: Dec 2006
Posts: 8,837
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In 81's and 82's, this is an important part of the CCC. Your car won't run right with the computer without it. On your 71, it's a great way to plug the hole in your head. Unless you're trying to bring your emissions equipment back to stock, just ignore it.
The similar sensor on the drivers side, if your car is so equiped, is for the temperature sender.
Instructor
Joined: Aug 2002
Posts: 124
Likes: 0
From: Williamsport PA
What is this sensor for??
Temperature sender , I had to replace mine, NAPA
there are a couple different senders , be sure to match
up one that your wire from your gauge to the sender
will fit .
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Team Owner
Joined: Aug 2006
Posts: 24,125
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From: Columbia Missouri
His stock temperature sender would be in his driver's side head. I think a previous owner plugged the other side with a different sender.
Burning Brakes
Joined: Feb 2004
Posts: 958
Likes: 1
From: In the Beautiful Shenandoah Valley of VA
It is for the primative emissions that were on the car. It was a temp sensor to tell the system it was up to temp. It is not needed unless you are going back to dead stock with the car. It was hooked into the vacuum advance of the car and would not let the car go into advance until it was completly warmed up. Most if not all were not working within the first year of use.
Steve
Team Owner
Joined: Jun 2001
Posts: 23,375
Likes: 1,067
From: Virginia USA
Yup TCS. The coolant gauge sensor on a 71 is in the drivers side head. The TCS temp sensor is in the passenger side head.
Ready to come down to Harrisonburg and twist some wrenches?
Safety Car
Joined: Sep 1999
Posts: 4,930
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From: AnyTown NJ
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Just to clarify, on a 71 the pass side is the temp sender for the TCS override. TCS kills vacuum to the distributer vacuum advance unit unless the transmission is in high gear or when the engine is cold or starting to overheat. The pass side sender tell the TCS system what the engine temp is. Driver side is the temp guage sender.
Le Mans Master
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
Just to clarify, on a 71 the pass side is the temp sender for the TCS override. TCS kills vacuum to the distributer vacuum advance unit unless the transmission is in high gear or when the engine is cold or starting to overheat. The pass side sender tell the TCS system what the engine temp is. Driver side is the temp guage sender.
http://ncrsrmc.org/Downloads/Mar-2006-Newsletter.pdf
Last edited by Duke94; Feb 10, 2007 at 02:45 PM. Reason: Add link
Safety Car
Joined: Sep 1999
Posts: 4,930
Likes: 11
From: AnyTown NJ
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Interesting reading Gary, thanks. I've never seen only one sensor on a 71 but I also know anything is possible. Does your one sensor do double duty?
Le Mans Master
Joined: Mar 2001
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From: Ann Arbor Michigan